Hello Forum,

In our system we are using S120 drives for the Fan Application controlling through v/f Mode (P1300-0)

There are 8 fans

My Motor data are as follows:

V-400 Volts

P-1.1 kW

N - 6070 RPM

F -105HZ  I -2.4Amps

I"m facing some issues with Drive ( for all the 8 Motors).Im able to run the fan with the max speed of 6070 rpm with 105HZ Frequency.

I receive over temperature fault in the Starter ( 140deg)after running of approx 20 minutes.

But physically there is no over temperature on the Motor when I checked with IR meter.The Temperature on the Motor is showing Ambient Temperature.( 35 deg) 

And we have not connected any temperature sensor from the Motor.Also The Motor does not have any PTC or RTD Terminals.

It is just a 3 phase power cable is going to the Motor from the Drive.

All the temperature sensor in the starter parameters are disabled.

Cou;d you please guide me Any special configuration has to be done in the Starter.

I hope this problem is parameter related.Thanks for your support.

Best Regards

.

Hello,

What is the fault code your receiving form drive?

as you said you have disabled temperature check for motor

But due to high frequency even power module can get over temperature fualt... unfortunately there is no fault code in your post 

Maybe attached document can help little

Hello Forum,

Thanks Forum.

We are getting the fault code is F7011 Motor Over temperature after 20 minutes of running.

We have disabled the bit 1 and bit 9 which was selected yes on the parameter. After selecting "NO" this fault is not appeared after.

But we would like to know is this right way to do that.or we need to do any other parameter settings for this Motor

Please find the screen shot with this

Br,

N.Vidhyadaran

Hello vidhyadaran_192006,

From your description it looks like, the motors are third party induction motors, i.e. non-Siemens make motors.

When no temp sensor is connected, set p0600 & p0601 = 1.

In case of induction motors, please set parameters as below so that motor thermal protection (based on motor data calculation & not actual motor measured) is set which is based on various measured signals like, current, speed, flux etc. etc.

P0612.1 = 1 Thermal motor model 2 activated

P0612.9 = 1 Extention which increases accuracy of motor model.

P0625 = Motor ambient temp = 45 Deg centigrade

P0626 = 50 K default value defines overtemp of stator iron over ambient temp.

P0627 = Defines rated overtemp of stator winding over ambient temp

P0628 = Defines rated overtemp of rotor over ambient temp

Check below values in drive parameter & confirm.

r0630  - ambient temp of motor model

r0631 – stator iron temp of motor model

r0632 – stator winding temp of motor model

r0633 – rotor temp of motor model.

If anyone of above parameter displays abnormal value, then you need to check motor data entered. Also hope you must have conducted one button tuning during commissioning, which sets most of parameters e.g. like, resistance, impedance etc. etc.

P.S. - When you set bit 1 & 9 - NO (I guess of P0612 -this setting deactivates induction motor thermal protection.

Thanks for your Reply.

I performed the stationery Measurement.

But I could not perform the P340 ( Automatic calculation of Parameters).If I try to set any value to perform this measurement then Automatically this value is coming back to 0 after 3 secs.

My question is that for V/F control mode , we cannot perform the tuning based on P340.

Please let me know.

I'm sure that some configuration of data on this motor is making some trouble like this.

Br,

N.Vidhyadaran